diff --git a/cpp/open3d/t/geometry/RaycastingScene.cpp b/cpp/open3d/t/geometry/RaycastingScene.cpp
index 31fdbeef856..bc003f8cbed 100644
--- a/cpp/open3d/t/geometry/RaycastingScene.cpp
+++ b/cpp/open3d/t/geometry/RaycastingScene.cpp
@@ -1179,7 +1179,7 @@ namespace fmt {
 template <>
 struct formatter<RTCError> {
     template <typename FormatContext>
-    auto format(const RTCError& c, FormatContext& ctx) {
+    auto format(const RTCError& c, FormatContext& ctx) const {
         const char* name = rtcGetErrorString(c);
         return format_to(ctx.out(), name);
     }
diff --git a/cpp/open3d/utility/IJsonConvertible.h b/cpp/open3d/utility/IJsonConvertible.h
index 8febffa566f..e18e2948a23 100644
--- a/cpp/open3d/utility/IJsonConvertible.h
+++ b/cpp/open3d/utility/IJsonConvertible.h
@@ -86,7 +86,7 @@ namespace fmt {
 template <>
 struct formatter<Json::Value> {
     template <typename FormatContext>
-    auto format(const Json::Value &value, FormatContext &ctx)
+    auto format(const Json::Value &value, FormatContext &ctx) const
             -> decltype(ctx.out()) {
         return format_to(ctx.out(), "{}", open3d::utility::JsonToString(value));
     }
diff --git a/cpp/open3d/visualization/rendering/RendererHandle.h b/cpp/open3d/visualization/rendering/RendererHandle.h
index dc8b06382e7..be69a3d99a8 100644
--- a/cpp/open3d/visualization/rendering/RendererHandle.h
+++ b/cpp/open3d/visualization/rendering/RendererHandle.h
@@ -164,7 +164,7 @@ struct formatter<
                          char>> {
     template <typename FormatContext>
     auto format(const open3d::visualization::rendering::REHandle_abstract& uid,
-                FormatContext& ctx) -> decltype(ctx.out()) {
+                FormatContext& ctx) const -> decltype(ctx.out()) {
         return format_to(ctx.out(), "[{}, {}, hash: {}]",
                          open3d::visualization::rendering::REHandle_abstract::
                                  TypeToString(uid.type),